Yopp-expressing variant ofY. pestis activates a potent innate immune response affording cross-protection against yersiniosis and tularemia

PloS One
Ayelet ZaubermanEmanuelle Mamroud

Abstract

Plague, initiated by Yersinia pestis infection, is a rapidly progressing disease with a high mortality rate if not quickly treated. The existence of antibiotic-resistant Y. pestis strains emphasizes the need for the development of novel countermeasures against plague. We previously reported the generation of a recombinant Y. pestis strain (Kim53ΔJ+P) that over-expresses Y. enterocolitica YopP. When this strain was administered subcutaneously to mice, it elicited a fast and effective protective immune response in models of bubonic, pneumonic and septicemic plague. In the present study, we further characterized the immune response induced by the Kim53ΔJ+P recombinant strain. Using a panel of mouse strains defective in specific immune functions, we observed the induction of a prompt protective innate immune response that was interferon-γ dependent. Moreover, inoculation of mice with Y. pestis Kim53ΔJ+P elicited a rapid protective response against secondary infection by other bacterial pathogens, including the enteropathogen Y. enterocolitica and the respiratory pathogen Francisella tularensis. Thus, the development of new therapies to enhance the innate immune response may provide an initial critical delay in disease progression f...Continue Reading

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Citations

Jul 7, 2017·Frontiers in Cellular and Infection Microbiology·Ayelet ZaubermanEmanuelle Mamroud
Feb 23, 2019·The Journal of Immunology : Official Journal of the American Association of Immunologists·Shannon J HeineMarcela F Pasetti

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